You put in your coins, press B4, and a metal coil begins to turn. Watch it. That rotation is a motor converting electrical energy into torque, and the electrical energy arrived through wires from a power plant where, most likely, water was boiled to spin a turbine. The candy bar is being delivered to you by steam.
Now the bag drops. It falls, and here is the quiet marvel: it falls at exactly the same acceleration as everything else in the universe, 9.8 meters per second squared, the identical rate as a dropped hammer, a raindrop, the Moon perpetually falling around the Earth. The machine cannot make the snack fall faster or slower. Gravity does not negotiate its terms for a bag of pretzels.
The glass front, which looks so solid you could rap your knuckles on it, is technically a liquid that has forgotten how to flow, its atoms frozen mid-tumble in a state that never quite decided to be a crystal. And the whole humming box is lit and chilled and waiting, burning energy around the clock to keep forty snacks a few degrees cooler than the room, radiating that heat patiently into the hallway, nudging the entropy of the entire hall a hair higher every second, as everything must.
The thing that gets me is the sugar in that candy bar. The plant that made it captured a photon, an actual particle of light that left the surface of the Sun and crossed ninety-three million miles of vacuum to strike a leaf, and locked that light's energy into a chemical bond.
You are about to unwrap eight minutes of sunlight and eat it standing in a fluorescent corridor, for a dollar fifty.